CN1133463A - Colour plane plate display device and image information processing method - Google Patents
Colour plane plate display device and image information processing method Download PDFInfo
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- CN1133463A CN1133463A CN95120503A CN95120503A CN1133463A CN 1133463 A CN1133463 A CN 1133463A CN 95120503 A CN95120503 A CN 95120503A CN 95120503 A CN95120503 A CN 95120503A CN 1133463 A CN1133463 A CN 1133463A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0235—Field-sequential colour display
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
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Abstract
According to the panel type color display device of the present invention, the image information is converted into the serial data in which the color data of colors R, G, and B are sequentially switched within the video frame, and the image data for one screen are repetitively overwritten in the respective color frames of R, G, and B at the time period of the display frame, and the liquid crystal is intermiittently driven plural times. Thus, the high-speed response and the large responding quantity of the liquid crystal can be surely obtained comparing with the case of continuously driving the liquid crystal. As a result, the video with high contrast can be realized in respective short color frames, and the gradation difference can be expressed by regulating the number of repetitive overwriting.
Description
The present invention relates to a kind of colour plane plate display device, particularly relate to have following display part and R, G, the colour plane plate display device of B back light of all kinds, above-mentioned display part is constituted by driving a plurality of pixel that changes transmittance according to image information, and above-mentioned R, G, B back light of all kinds can carry out conducting respectively by control independently according to this image information.
In recent years, along with household appliances light weight, slimmings such as OA machine such as personal computer and TVs, display device is required lightweight, slimming.Thus, carry out the exploitation of liquid crystal indicator light weights such as (LCD), slim flat display, as the substitute of the CRT that popularizes now.
Can enumerate full colorization and be used as a desired technological project on these flat displays.For example, the color LCD of TFT mode is realized colorize by adopting the active matrix mode.According to this TFT mode, even carry out pulsed drive,, just can carry out high-duty and drive because capacitor can keep the storage effect with a unit, the LCD of excellent contrast just can be provided.But,, then still have the problem of cost height and fabrication yield difference up to now owing to need the many TFT of VGA specification.
On the other hand, in the STN mode, realize colorize by adopting the simple matrix mode, and color LCD cheaply successfully is provided.But frame speed lags behind and is easy to take place colour mixture, just the problem of poor contrast is arranged.Thereby, show in order to realize high-contrast and frames in high speed, and proposed for example various type of drive such as double-matrix electrode drive mode and time-division type of drive.And, provide to make small-pulse effect disperse to replace big strobe pulse, scan whole lines simultaneously, under the situation that does not reduce resolution, attempt the active-addressed type of drive that realizes that high-contrast and high frame show.
But, existing colored LCD, no matter the TFT mode still is the STN mode, adopts the colour filter mode of the color filter of being made up of R (red), G (green), B (indigo plant) three primary colors mostly.Thus, for example lighting under the situation of R, the regional light tight color of carrying out of G, B shows by the regional printing opacity that makes R.But,, under the situation of optical filtering mode,, just must drive white three times of pixels of deceiving when showing owing to need the pixel in correspondence each R, G, B zone respectively even consider simply.Thus, in order to obtain the image of high image resolution, both required to carry out imperceptible processing, Driving technique is complicated again, and must improve the transmittance of light filter itself, and is difficult to carry out colour balance adjustment etc., has the problem that much need solve.
Thereby, recently, as the spy open flat 4-338996 communique disclosed, proposed by lighting R, G, B each arbitrary source of all kinds successively periodically, synchronously apply the chrominance signal that corresponds respectively to each pixel with this ignition period, utilize the color flat panel display of the three looks mode backlight of R, the G that can obtain full-color image, each color light source of B.
But, in existing colour filter mode, owing to can carry out the treated as such of parallel data to R, G, B signal, then under situation for example with the image of R signal exhibit high brilliance, with dynamically haveing nothing to do of G signal, B signal, by utilizing the storage effect of the capacitor in the LCD driving circuit, just can be at the overlapping recording image data in the Zone R territory of pixel, and can easily obtain the coloured image of high-contrast.
But, in three looks mode backlight, after color image information being transformed into the serial data that R, G, B image information of all kinds switch successively with predetermined period of time, by lighting of all kinds backlight of R, G, B synchronously successively, and realize colorize with the switching cycle of serial data of all kinds.For this reason, as shown in figure 11, for example be under the situation with R signal exhibit high brilliance image, for the liquid crystal conducting that makes the intended pixel zone by the R signal, in the next cycle, make it to turn-off, thereby can not obtain high light transmission capacity, and can not obtain the coloured image of high-contrast by G signal, B signal.And related acting characteristic reveals under the situation of colorize especially significantly realizing in the STN mode, thereby wishes to find solution.
The present invention in view of in the face of will with three looks mode backlight realize flat-panel monitor colorize situation the problems referred to above and propose, therefore, the purpose of this invention is to provide a kind of novelty and improved colour plane plate display device, by improving the drive signal of pixel, can improve the frame response performance of each pixel and obtain the coloured image of high-contrast, be particularly suitable for the LCD of STN mode.
Another object of the present invention provides a kind of novelty and improved colour plane plate display device, unfolded image information at high speed, and seek high speed for the information transfer rate of LCD.
In order to solve above-mentioned problem, the invention provides a kind of novelty and display device improved three looks mode backlight, comprising by driving according to image information and changing the display part that a plurality of pixel constituted of transmittance and R, G, the B back light of all kinds that can carry out break-make control independently of one another according to this image information.According to first viewpoint of the present invention, be preferably in the above-mentioned display device and be provided with: the device that color image information is transformed into the serial data that R, G, B image information of all kinds switch successively with predetermined period of time; R in each time cycle, G, B serial data of all kinds are transformed into R, the G that drives the many pixels in each preset range, the device of B imaging data of all kinds; In each time cycle, repeatedly repeat to drive the device of the many pixels that are positioned at preset range according to R, G, B imaging data of all kinds.In this case, preferably further be provided with according to the device that drives the number of times of a plurality of pixels in preset range from the half-tone information that image information obtained in each time cycle inner control.
According to another viewpoint of the present invention, in above-mentioned display device, be provided with: color image information is transformed into the device that switches the serial data of R, G, B image information of all kinds with predetermined period of time successively; R in each time cycle, G, B serial data parallel expansion of all kinds are become the first individual data bus means of L; By the pixel of the M * N in the preset range is in turn write L address to L parallel data corresponding to each pixel respectively simultaneously, store the memory storage of L the imaging data of forming by M * N Pixel Information; From L imaging data, select the selecting arrangement of K imaging data; From memory storage a selected K imaging data is divided into N time respectively and reads second data bus means of M Pixel Information at every turn, the pixel of the M * N in the preset range is driven K time drive unit by the K that an is read imaging data in the time cycle.In this case, selecting arrangement can determine according to the number of times of selecting imaging data from the half-tone information that above-mentioned image information obtained.
Another viewpoint according to the present invention, above-mentioned display device comprises: color image information is transformed into the device that switches the serial data of R, G, B image information of all kinds with predetermined period of time successively; Is the R in each time cycle, G, B serial data parallel expansion of all kinds first data bus means of desired full grey (L); By the pixel of the M * N in the preset range is in turn write L address to L parallel data corresponding to each pixel simultaneously, store the memory storage of L the imaging data of forming by M * N Pixel Information; From memory storage the imaging data of reading desired grey (K) the imaging data is divided into N time respectively and reads second data bus means of M Pixel Information at every turn; The pixel of the M * N in the preset range is carried out the drive unit of K driving by the K that an is read imaging data in the time cycle.
According to another viewpoint of the present invention, a kind of image information processing method is provided, it is characterized in that, when coming processing image information by storer with at least three different addresses of zone, the address that only makes the data field of parallel expansion is that whole addresses are effective, by the specified data of remaining address parallel processing.In this case, can constitute when write operation and during read operation active data district, whole address inequality.
According to the present invention, for example the common composite signal of TSC-system is separated into R, G, B chromatic number certificate of all kinds, and these chromatic numbers are according to being transformed to the serial data of switching with predetermined period.At this, be that representative illustrates action of the present invention with the R signal.At first, drive under the situation of preset range as 640 * 480 image, form 640 * 240 R look imaging data at two parts about being included in the R signal branch of serial data each cycle.According to this imaging data, by in each cycle, repeatedly repeating to drive the pixel in the above-mentioned scope, just can rotate liquid crystal widely, can obtain high brightness.By adjust the number of times that drives pixel according to half-tone information, just can need to increase the driving number of times under the situation of high brightness, and under low-light level under the enough situation by reducing to drive number of times, just can on pixel, produce gray scale difference, and obtain the image of high-contrast.
Be described more specifically action of the present invention below.Be transformed to the R signal of above-mentioned this serial data, by first data bus means according to desired full grey (for example L=256) parallel expansion.Store into respectively in the storer with another gray scale address by data, and form 256 640 * 240 R look imaging data 256.Then, after in storer, forming R look imaging data, simultaneously read at 640 according to each line address at every turn and read 240 secondary data, be higher than far away and read simultaneously a bit at every turn and read needed certain the existing speed of reading action successively of 640 * 240 secondary data and read R look imaging data one time.According to the present invention, because each R look imaging data that this high speed is read, in each colour frame, read by repeatedly (the highest 256 times) in the time at T/256, drive pixel, thereby under the equal situation of total driving time (T), compare with the existing mode that only drives a pixel at T in the time, can obtain the liquid crystal actuating quantity of extremely wide dynamic range.Like this, than existing, can obtain the image of high-contrast.And the number of times by selecting to drive pixel according to grey (for example when full gray scale, carries out 256 times and drives; When 1/2 gray scale, carry out 128 times and drive), just can show gray scale difference.
According to disposal route by the image information that the present invention constituted, preparation can be carried out gray processing according to the gray scale address and can store and the relevant display message of each pixel of for example being managed by row address and data selector address, as the memory set of the video data of gray shade scale.Thus, as the expression of Figure 10 pattern ground, when write operation, making the gray scale address is that the full address is effective, 8 Bit datas are deciphered, after for example expanding into 256 data buses, by row address (0～239) and data selector address (0～639), corresponding each gray scale address is written in parallel to 256 bits.To this, when read operation, making the data selector address is that the full address is effective, by specifying gray scale address (0～255) and row address (0～239), with regard to the video data of each line of energy parallel read-out.
Such as mentioned above, according to this method, combined three kinds of addresses that the zone is different with different actions, the address of the data field by making parallel expansion is that the full address is effective, just can handle lot of data simultaneously synchronously a markers, and can make information transfer rate high speed to LCD, improve the sensitivity that LCD drives.
Fig. 1 is the key diagram of the notion of the explanation picture frame, the color framing that are used for one embodiment of the invention, display frame;
Fig. 2 is the key diagram of the action of the explanation liquid crystal relevant with an embodiment of the display device that adopts repetition display mode of the present invention.
Fig. 3 is the key diagram of the explanation display gray scale performance relevant with an embodiment who adopts the display device of complying with repetition display mode of the present invention.
Fig. 4 is the system construction drawing that one of the driving circuit according to the display device of repetition display mode of the present invention embodiment is adopted in expression;
Fig. 5 is the pie graph of expression applicable to the memory construction of 1 pixel of system shown in Figure 4;
Fig. 6 is the data sequence launched on the memory set that is illustrated in applicable to system shown in Figure 4 and the key diagram of data content;
Fig. 7 is that expression is applicable to that the storer of system shown in Figure 4 writes the timing chart of the timing of action;
Fig. 8 is the timing chart of the timing of reading action that expression is applicable to the storer of system shown in Figure 4;
Fig. 9 is the timing chart of expression employing according to the display action of another embodiment of the display device of repetition display mode of the present invention;
Figure 10 is the key diagram of expression according to the outline of the disposal route of image information of the present invention; And
Figure 11 is a color switching action timing chart regularly of representing 3 looks mode backlight in the past.
Following with reference to accompanying drawing, the preferred embodiments of the present invention are illustrated.
1. the definition of frame
At first, with reference to Fig. 1, the key concept of the action (hereinafter referred to as repeating display mode) of the colour display device that constitutes according to the present invention is described.In repeating display mode, note the frame frequency of (1) picture frame, (2) color framing, these three kinds of different in kinds of (3) display frame, thereby talk about from the notion of these frames.
(1) picture frame
This picture frame is maximum frame unit, for example is 40～50Hz (frequency about 20～20mS) (time cycle).The composite signal of TSC-system formula be separated into R, G, B chromatic number of all kinds according to after, in the cycle R, G, B image information of all kinds are transformed into the serial data of switching successively at color framing described later.Image frame defining total ascent time of the color framing time cycle once of all kinds of R, G, the B in the serial data for this reason.In this picture frame, for the visually synthetic coloured image of regarding as of R image, G image, B image, be coloured image by in the degree that can obtain perfect quality, setting this picture frame, can determine following color framing, the time cycle of display frame.
(2) color framing
Color framing is in the serial data by above-mentioned formation, switches the time cycle with relevant information of all kinds.In addition, with regard to regard to the relation of picture frame, color framing is that picture frame is assigned 3 periods time cycles that become to be used to show R, G, B image information of all kinds, and for example picture frame is set at 40～50Ha (during 20～25mS) scopes, the frequency of color framing is in 120～150Hz (scope of 6.6～8.3mS).Thereby if this color framing is long, for increase by following display frame repeat to show number of times, can increase the dynamic range of liquid crystal variable quantity and obtain the image of high-contrast.But color framing is long, visually feel the flicker and bad.Thereby, in fact, need the adjusted value of setting color frame as various parameters such as flicker and contrasts.In addition, in 3 looks mode backlight in the past,, there is restriction naturally in the contrast of gained, particularly under the situation that is applicable to the STN mode, can not obtains the coloured image of several satisfactions for the adjustment by this color framing improves image quality.This point in repetition display mode of the present invention, owing to cause following display frame notion, can obtain the more image of high-contrast.
(3) display frame
So, according to the present invention, from R, G, the resulting image information of all kinds of B serial data of all kinds, preset range (hereinafter referred to as the imaging scope) for example the image segmentation of 640 * 480 bits be under the occasion of up and down twice driving, become the imaging data of the pixel that drives 640 * 240 bits.And this display frame is defined as the time that in above-mentioned color framing, once drives the pixel of above-mentioned imaging scope with this imaging data.Thereby the cycle of this display frame is long more, and the imaging scope may enlarge more.But, as described later, in repetition display mode of the present invention, in gamut of coloration of all kinds, enlarged the liquid crystal variable quantity of accumulation by in this display frame unit, carrying out repeatedly imaging, because of wanting to obtain the image of high-contrast, if the cycle of display frame is short, the also corresponding increase of imaging number of times just can obtain higher contrast.In addition, as described later, repeat display mode, regulate, be additional gray scale difference, increase the imaging number of times by the cycle that shortens display frame and just can increase grey because the imaging number of times is shown frame by this.Thereby, in the cycle of decision display frame, need be considered to various parameters such as picture scope, contrast, grey.For example, under situation with complete 256 gray scales performance, need in a color framing, insert 256 display frames, such as, when the setting color frame is that (during 6.6mS～8.3mS), display frame frequency (cycle) approximately is 30KHz～38KHz (26 μ S～33 μ S) to 120Hz～150Hz.
2. repeat the elemental motion of display mode.
Then with reference to the action of Fig. 2 explanation based on the display device of the repetition display mode that the present invention constituted.Aim of the present invention is, performance to the liquid crystal of drive signal, derivative characteristic when integral characteristic when being conceived to represent to rise and expression descend, if total driving time is identical, according to through always driving the liquid crystal actuating quantity that time continuous drive liquid crystal is produced, by through repeatedly repeating to drive liquid crystal, improve integrated value at the liquid crystal actuating quantity that each driving time carried out.
According to 3 looks mode backlight in the past, allow only conducting when Tx of actuating signal, (after t0～t2) drives liquid crystal, actuating signal is ended,, and obtain during the demonstration of t0～t3 during this period by decaying naturally of liquid crystal.Thereby, the liquid crystal actuating quantity Y1 of in the past actuating signal is represented with following formula (1).
In contrast, in repeating display mode, each driving time has been lacked, the good part (Y2) of the action response when rising because of the recycling liquid crystal, even T.T. and the identical (Tx=Ta+Tb+ of mode in the past ... + Tn), can obtain the liquid crystal actuating quantity Y4 of the accumulation also bigger than in the past liquid crystal actuating quantity Y1.That is, the liquid crystal ascending amount Y2 in each driving time in repeating display mode is expressed by following formula (2).
In addition, the liquid crystal slippage Y3 in each driving time in repeating display mode is expressed by following formula (3).
Thereby, at T.T. (Tx=Ta+Tb+ ... the semi-invariant Y4 of+resulting liquid crystal action in Tn) expresses with following formula (4).Because above result because of Y4＞Y1, if with repetition display mode of the present invention, in the identical time, can obtain the liquid crystal actuating quantity of the mode of being more than before.Promptly, if just Fig. 1 illustrates, the time cycle of display frame is set at each driving time (Ta, Tb ... Tn) sum total Tx owing to show through repeatedly repeating, can be higher than the liquid crystal actuating quantity of mode in the past far away in each color framing in the time cycle of each color framing.
3. by repeating the level performance that display mode produced
According to the present invention,, can show display gray scale by regulating by the imaging number of times that display frame produced in each color framing.
That is,, as shown in Figure 3,, then can adjust the accumulation actuating quantity of liquid crystal by adjusting to conducting closing time of liquid crystal driving signal according to repetition display mode of the present invention.For example,, make the action of liquid crystal reach saturation point, then can carry out the demonstration of full gray scale by in whole display frames, all carrying out imaging.In addition,, carry out imaging, make the action of liquid crystal reach efficiency of movement 1, can carry out 1/2 gray scale imaging by in the display frame of its two/numbers.Have again,, make the liquid crystal action reach efficiency of movement 2, can carry out 1/4 gray scale imaging owing in the display frame of its two/numbers, carry out imaging.As mentioned above, according to the present invention,, can show display gray scale by regulating by the imaging number of times that display frame produced in each color framing.
In addition, when the control display gray scale, repeatedly read same image-forming information, can show according to gradation data.But, the image-forming information of being managed by the gray scale address described later is only prepared in advance full grey, by, read image-forming information successively according to half-tone information and show, then can obtain frame response more at a high speed.In addition, as described later, as one group, also the combination of available this group comes display gray scale the predetermined times display frame.When having that for example the storer of 256 gray scale addresses is managed image-forming information, set 256 grades gradation data, can therefrom read the arbitrary number of times image-forming information, but be 1 group with 32 times display frame, and constituting 8 grades of gray scales, the colour that just can carry out 8 gray scales shows.
4. system architecture
Expression is based on the system architecture of the colour display device of repetition display mode of the present invention in Fig. 4～Fig. 8.But, for those skilled in the art, design various system architectures in the technological thought scope that can in claims, be put down in writing, self-evident structure for these systems belongs to technical scope of the present invention certainly.
Being constructed as follows of present embodiment, common mixed signal to the TSC-system formula of every 16.6mS input, carrying out colour by RGB selector switch 10 cuts apart, again every color framing R, G, B are of all kinds is transformed into after the RGB serial data of switching on the cycle, are transformed into 82 system data by A/D transducer 12.Then, make the video data of 1 picture of all kinds contained in each color framing, respectively picture segmentation is up and down become the video data of expression top picture and the video data of bottom picture by L/U selector switch 14, deliver to data selector 16U and data selector 16D more respectively.For example, when carrying out at 640 * 480 when showing, separately the picture video data of 640 * 240 bits is delivered to data selector 16U, 16D as each imaging region up and down.Have, the vertical synchronization of STNC signal and horizontal synchronization are counted by timing code translator 18 again, in order to carry out the synchronous of various signals.
So, deliver to the view data of data selector 16U, 16D, by data device 16U, 16D according to the position on the picture, expand into required grey concurrently through the 1st data 20U, 20D, such as 256, according to line address signals and the gray scale address signal of delivering to address counter 22U, 22D, be launched into data structure RAM group 24U, 24D again.Its result, relevant with the image information of a picture frame, about R, G, B color framing of all kinds, be stored in 640 * 240 bit image data of being managed in the 256 gray scale addresses.In addition, subtend data structure RAM group 24U, 24D write regularly, can action as shown in Figure 7 regularly implement.
With reference to Fig. 5 and Fig. 6 in detail this point is described in detail.In addition, Fig. 5 represents the memory construction of 1 pixel, and Fig. 6 represents respectively the data ordering and the data content that launch at data structure RAM group 24U, 24D.As shown in Figure 5, the view data of 1 pixel is of all kinds for R, G, B, from data selector 24, by the 1st data bus 20, according to grey, expands into 256 concurrently, deposits 256 memory locations being managed in gray scale address counter 22a respectively in.Have, the positional information on these pixel data one pictures is managed by line address counter 22b again.Therefore, in data structure RAM group 24U, 24D, as shown in Figure 6, about each pixel region by the line address defined in 640 data selector zone 240, decision is unfolded image information and storing in 256 gray scale addresses respectively.And that this state of analog representation is Fig. 1, about each color framing of each view data, only represents the state of overlapping storage with regard to the display frame of one group of gray scale.
By above-mentioned, the view data that is stored in data structure RAM group 24U, 24D is by the 2nd data bus means 26U, 26D, by thread count 28U, 28D the counting each 1 line read one group of 240 line, can drive the 30U of liquid crystal display part up and down of the viewing area of 640 * 480 bits, each pixel of 30D.Then, at this moment,,, as shown in Figure 3,, read requisite number purpose image information successively according to the gray scale address that designated store the view data of reading according to the half-tone information of each picture by repetition display mode of the present invention.Because system constitutes like this, relatively enlarged the actuating quantity of liquid crystal with mode in the past, seek the gray processing of liquid crystal action simultaneously, also can realize to display part transmitting high speed information.In addition, with regard to come from data structure RAM group 24U, 24D read regularly with regard to, can regularly implement by action shown in Figure 8.In addition, about the more specifically timing of display action, with reference to Fig. 9 aftermentioned.
5. repeat the display action timing of display mode
Then, the display action to the repetition display mode of the present invention system that can implement above structure describes with reference to timing chart shown in Figure 9.In addition, in the embodiment shown in fig. 9, for the purpose of simplifying the description, suppose that imaging region 32 points (4 bits * 8 piece) * 32 carries out colour and shows.
For example, when the pulse signal of 100nS is controlled as a block signal, because can carry out the data presentation of 14 bits, for the data that show 32 1 line then need 800nS at 1 pulse (100nS).Like this,, can show the image information of a group of pictures, illustrate that this action required time cycle is set at display frame according to the present invention by showing 32 lines by line ground.And to present embodiment, display frame needs 25.6 μ S.And according to the present invention, this display frame is repeated 256 times, constitutes the color framing of 6.55mS, by repeating to be shown as picture, can obtain high contrast.For degree of performance, among the present invention, 256 display frames, set 8 grades gradation data in addition, every gray scale 819.2 μ S, 32 display frames adopt the structure by gray scale address administration imaging number of times.Have again, among the present invention, constitute gradation data though be one group with 32 continuous display frames, the not mediocre speech of putting, with 1+8n, 2+8n ... 8+8n (n=0,1,2 ... 31) display frame is one group and also can constitutes gradation data.So, constitute R, G, B color framing of all kinds by 256 times display frames, each shows once to make R, G, B color framing of all kinds, constitutes the picture frame of 19.66mS, and the result responsively demonstrates the coloured image that the expection gray scale is arranged of high-contrast with height.
Have again, in above embodiment,, the present invention is illustrated, the invention is not restricted to the embodiment that is enumerated though be example with liquid crystal indicator (LCD).The present invention can be applicable to all flat pannel display of 3 look backlight types, for example can preferably be applicable to the occasion that the magnetic fluid display relevant with the applicant employing flat pannel display such as (special hope flat 5-191787 number, spy's hope flat 5-270063 number, spy are willing to flat 6-156816 number) is carried out the colour demonstration.In addition, the present invention is particularly suitable for the LCD of STN mode, but the invention is not restricted to this, also applicable to the LCD of variety of ways such as TFT mode, ECB mode, forceful electric power perception mode, a serial mode.
The present invention constitutes because of pressing with upper type, so can obtain the effect of the excellence of following explanation.
(1) by the high speed of the liquid crystal responsiveness that repeats display mode
According to the present invention, in each color framing, repeatedly repeat to write the view data of 1 picture, liquid crystal is driven off and on several times, thereby compare with the occasion of continuous drive liquid crystal, can make the responsiveness high speed of liquid crystal, guarantee big actuating quantity, its result can obtain the image of high-contrast in each short color framing.
(2) gray processing that moves by the liquid crystal that the demonstration number of times that repeats display mode is controlled
According to the present invention owing to regulated the number of times of the view data that in each color framing, repeats to write 1 picture, can be in each short color framing representing gradation poor.That is, expecting under the situation of high brightness that increase and repeat to show number of times, under the situation enough than low-light level, minimizing repeats to show and can show gray scale difference thus by number of times.
(3) to the high speed of the information transmission of LCD
According to an embodiment of system architecture of the present invention, for by line address and data selector address administration prepared to can be used as the data that show different gray scales for information about with each pixel, by gray scale address gray processing and memory storing group.Thereby, shown in the pattern of Figure 10, when write activity, for making full address, gray scale address effective, with the decoding of 8 Bit datas, for example after launching on the 256 single data buses, according to the indication of line address (0～239) and data selector address (0～639), corresponding to each gray scale address, be written in parallel to 256 bits.On the contrary, reading when action, for location, leeway, data selector address effective, according to the indication of gray scale address (0～255) and line address (0～239), the video data of each line of parallel read-out.
As mentioned above, in the present invention, 3 kinds of different addresses of zone are made up by different actions, owing to the full address, address of the data area that makes parallel expansion is effective, then can regularly handle lot of data simultaneously by 1 clock, make the speed high speed of the information that transmits to LCD, improved the sensitivity that LCD drives.
Claims (10)
1. colour plane plate display device, this device comprises: by drive display part that a plurality of pixel constituted that changes transmittance and R, G, the B back light of all kinds that can carry out break-make control according to this image information respectively independently according to image information, it is characterized in that, comprising:
Color image information is transformed into the device that switches the serial data of R, G, B image information of all kinds with predetermined period of time successively;
R, G, B serial data of all kinds in above-mentioned each time cycle is transformed into R, the G that drives a plurality of pixels in the preset range respectively, the device of B imaging data of all kinds; And
In above-mentioned each time cycle, repeatedly repeat to drive the device of a plurality of pixels in above-mentioned preset range according to above-mentioned R, G, B imaging data of all kinds.
2. colour plane plate display device according to claim 1 is characterized in that, further is provided with according to be controlled at the device that drives the number of times of a plurality of pixels in above-mentioned preset range in above-mentioned each time cycle from the half-tone information that above-mentioned image information obtained.
3. colour plane plate display device according to claim 1 is characterized in that, above-mentioned display device is the liquid crystal indicator of STN mode.
4. colour plane plate display device, this device comprises: by drive display part that a plurality of pixel constituted that changes transmittance and R, G, the B back light of all kinds that can carry out break-make control according to this image information respectively independently according to image information, it is characterized in that, comprising:
Color image information is transformed into the device that switches the serial data of R, G, B image information of all kinds with predetermined period of time successively;
R, G, B serial data parallel expansion of all kinds in above-mentioned each time cycle is become the first individual data bus means of L;
By the pixel of the M * N in the preset range is in turn write L address to L parallel data corresponding to each pixel respectively simultaneously, store the memory storage of L the imaging data of forming by M * N Pixel Information;
From an above-mentioned L imaging data, select the selecting arrangement of K imaging data;
From above-mentioned memory storage a selected K imaging data is read M Pixel Information respectively at every turn, divide second data bus means of reading for N time;
The pixel of the M * N in the preset range is carried out the drive unit of K driving by the K that an is read imaging data in the above-mentioned time cycle.
5. colour plane plate display device according to claim 4 is characterized in that: above-mentioned selecting arrangement is according to decide the number of times K that selects imaging data from the half-tone information that above-mentioned image information obtained.
6. colour plane plate display device according to claim 4 is characterized in that, above-mentioned display device is the liquid crystal indicator of STN mode.
7. colour plane plate display device, this device comprises: by drive display part that a plurality of pixel constituted that changes transmittance and R, G, the B back light of all kinds that can carry out break-make control according to this image information respectively independently according to image information, it is characterized in that, comprising:
Color image information is transformed into the device that switches the serial data of R, G, B image information of all kinds with predetermined period of time successively;
Is R, G, the B serial data parallel expansion of all kinds in above-mentioned each time cycle first data bus means of desired full grey (L);
By the pixel of the M * N in the preset range is in turn write L address to L parallel data corresponding to each pixel respectively simultaneously, store the memory storage of L the imaging data of forming by M * N Pixel Information;
From above-mentioned memory storage the imaging data of desired grey (K) during reading imaging data is read M Pixel Information respectively at every turn and divide second data bus means of reading for N time; And
The pixel of the M * N in the preset range is carried out the drive unit of K driving by the K that an is read imaging data in the above-mentioned time cycle.
8. colour plane plate display device according to claim 7 is characterized in that, above-mentioned display device is the liquid crystal indicator of STN mode.
9. the disposal route of an image information, it is characterized in that, when coming processing image information by the storer with at least three different addresses of zone, the address that only makes the data field of parallel expansion is that the full address is effective, by the specified data of remaining address parallel processing.
10. the disposal route of image information according to claim 9 is characterized in that, when write operation and during read operation, becomes active data district, full address difference.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28438794 | 1994-10-24 | ||
| JP284387/94 | 1994-10-24 | ||
| US08/546,330 US6078304A (en) | 1994-10-24 | 1995-10-20 | Panel type color display device and system for processing image information |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1133463A true CN1133463A (en) | 1996-10-16 |
Family
ID=26555449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95120503A Pending CN1133463A (en) | 1994-10-24 | 1995-10-23 | Colour plane plate display device and image information processing method |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US6078304A (en) |
| EP (1) | EP0709823A3 (en) |
| CN (1) | CN1133463A (en) |
| CA (1) | CA2161184A1 (en) |
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| CN1328706C (en) * | 2001-01-10 | 2007-07-25 | 三菱电机株式会社 | Color image display device |
| CN100335949C (en) * | 2003-12-02 | 2007-09-05 | Lg.菲利浦Lcd株式会社 | Liquid crystal display device and driving method thereof |
| CN100405827C (en) * | 2003-04-09 | 2008-07-23 | 松下电器产业株式会社 | Display control device and display device |
| CN100461238C (en) * | 2005-09-09 | 2009-02-11 | 中华映管股份有限公司 | Multiple frequency scanning method and display having the same |
| US7903052B2 (en) | 2003-11-14 | 2011-03-08 | Samsung Mobile Display Co., Ltd. | Pixel driving circuit for a display device and a driving method thereof |
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| CN1328706C (en) * | 2001-01-10 | 2007-07-25 | 三菱电机株式会社 | Color image display device |
| CN100405827C (en) * | 2003-04-09 | 2008-07-23 | 松下电器产业株式会社 | Display control device and display device |
| US7903052B2 (en) | 2003-11-14 | 2011-03-08 | Samsung Mobile Display Co., Ltd. | Pixel driving circuit for a display device and a driving method thereof |
| US8274455B2 (en) | 2003-11-14 | 2012-09-25 | Samsung Display Co., Ltd. | Pixel driving circuit for a display device and a driving method thereof |
| CN100335949C (en) * | 2003-12-02 | 2007-09-05 | Lg.菲利浦Lcd株式会社 | Liquid crystal display device and driving method thereof |
| CN100461238C (en) * | 2005-09-09 | 2009-02-11 | 中华映管股份有限公司 | Multiple frequency scanning method and display having the same |
Also Published As
| Publication number | Publication date |
|---|---|
| US6078304A (en) | 2000-06-20 |
| EP0709823A3 (en) | 1997-10-22 |
| US6577292B1 (en) | 2003-06-10 |
| EP0709823A2 (en) | 1996-05-01 |
| CA2161184A1 (en) | 1997-04-24 |
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